石油实验地质
石油實驗地質
석유실험지질
EXPERIMENTAL PETROLEUM GEOLOGY
2014年
1期
39-45
,共7页
油源对比%成藏期次%油藏类型%分布规律%青东凹陷%济阳坳陷
油源對比%成藏期次%油藏類型%分佈規律%青東凹陷%濟暘坳陷
유원대비%성장기차%유장류형%분포규률%청동요함%제양요함
oil and source correlation%accumulation period%reservoir type%distribution rule%Qingdong Sag%Jiyang Depression
青东凹陷是济阳坳陷勘探程度较低地区，同时也是近期勘探重点和热点地区。综合地质、地震和分析化验等资料，对该区油藏特征和分布规律进行了系统研究。结果表明，该区发育了咸化低熟、咸化成熟、正常成熟3类原油。咸化低熟、咸化成熟原油都来自于沙四段烃源岩，正常成熟原油来源于沙三段烃源岩。该区具有馆陶末期和明化镇期-第四纪2期成藏的特点，晚期充注范围较大，为主要成藏期。青东凹陷发育了构造、地层、岩性和复合类4种油藏类型。纵向上，油气主要分布于沙四上亚段；平面上，青东凹陷共发育东北部走滑断裂构造带、西北部斜坡构造带、中央地垒构造带和青东-青南过渡构造带4个油气富集区带。西北部斜坡构造带可作为近期海上现实的重点勘探区域。
青東凹陷是濟暘坳陷勘探程度較低地區，同時也是近期勘探重點和熱點地區。綜閤地質、地震和分析化驗等資料，對該區油藏特徵和分佈規律進行瞭繫統研究。結果錶明，該區髮育瞭鹹化低熟、鹹化成熟、正常成熟3類原油。鹹化低熟、鹹化成熟原油都來自于沙四段烴源巖，正常成熟原油來源于沙三段烴源巖。該區具有館陶末期和明化鎮期-第四紀2期成藏的特點，晚期充註範圍較大，為主要成藏期。青東凹陷髮育瞭構造、地層、巖性和複閤類4種油藏類型。縱嚮上，油氣主要分佈于沙四上亞段；平麵上，青東凹陷共髮育東北部走滑斷裂構造帶、西北部斜坡構造帶、中央地壘構造帶和青東-青南過渡構造帶4箇油氣富集區帶。西北部斜坡構造帶可作為近期海上現實的重點勘探區域。
청동요함시제양요함감탐정도교저지구，동시야시근기감탐중점화열점지구。종합지질、지진화분석화험등자료，대해구유장특정화분포규률진행료계통연구。결과표명，해구발육료함화저숙、함화성숙、정상성숙3류원유。함화저숙、함화성숙원유도래자우사사단경원암，정상성숙원유래원우사삼단경원암。해구구유관도말기화명화진기-제사기2기성장적특점，만기충주범위교대，위주요성장기。청동요함발육료구조、지층、암성화복합류4충유장류형。종향상，유기주요분포우사사상아단；평면상，청동요함공발육동북부주활단렬구조대、서북부사파구조대、중앙지루구조대화청동-청남과도구조대4개유기부집구대。서북부사파구조대가작위근기해상현실적중점감탐구역。
Locating in the Jiyang Depression, the Qingdong Sag, with low exploration degree, is a recent explo-ration focus. Reservoir characteristics and distribution regularities were studied based on geological, seismic and chemical data. The results showed that, 3 types of crude oils developed in the study area, including salty low-mature, salty mature and normal-mature ones. The salty low-mature and salty mature crude oils both originated from source rocks in the 4th member of the Shahejie Formation, and the normal-mature crude oils originated from source rocks in the 3rd member of the Shahejie Formation. The process of petroleum accumulation was divided in-to 2 major phases:the first one at the end of Guantao and the second one from Minghuazhen to Quaternary. Dur-ing the second phase, hydrocarbon charging was widespread, and it was the main phase for accumulation. 4 types of reservoirs generated in the Qingdong Sag, including structural, stratigraphic, lithologic and composite ones. Vertically, oil and gas mainly distributed in the upper section of the 4th member of the Shahejie Formation. On plane chart, oil and gas are abundant in the northeastern strike-slip fault zone, the northwestern slope belt, the central horst belt and the Qingdong-Qingnan transition belt, among which the northwestern slope belt was regar-ded as the key target for future exploration.
